TSI Tron bars are built from 4130 chromoly and feature 1 1/4 standard size tubing which is compatible with all compression systems aside from HIC. The top bar is .083 thick with a middle reinforcement for strength, which is welded precisely to prevent heat warping, and compromising tube strength. Engineered for strength. Tested and approved for street by Hep Greg Cohen. These bars come stock 27" tall and 23" wide for even the biggest riders to shred.